PMID- 16954668 OWN - NLM STAT- MEDLINE DCOM- 20060918 LR - 20071114 IS - 1424-859X (Electronic) IS - 1424-8581 (Linking) VI - 114 IP - 3-4 DP - 2006 TI - Molecular cytogenetic characterization of chromosome 9-derived material in a human thyroid cancer cell line. PG - 284-91 AB - The incidence of papillary thyroid carcinoma (PTC) increases significantly after exposure of the head and neck region to ionizing radiation, yet we know neither the steps involved in malignant transformation of thyroid epithelium nor the specific carcinogenic mode of action of radiation. Such increased tumor frequency became most evident in children after the 1986 nuclear accident in Chernobyl, Ukraine. In the eight years following the accident, the average incidence of childhood PTCs (chPTC) increased 70-fold in Belarus, 200-fold in Gomel, 10-fold in the Ukraine and 50-fold in Tschnigov, Kiev, Rovno, Shitomyr and Tscherkassy compared to the rate of about 1 tumor incidence per 106 children per year prior to 1986 (Likhtarev et al., 1995; Sobolev et al., 1997; Jacob et al., 1998). To study the etiology of radiation-induced thyroid cancer, we formed an international consortium to investigate chromosomal changes and altered gene expression in cases of post-Chernobyl chPTC. Our approach is based on karyotyping of primary cultures established from chPTC specimens, establishment of cell lines and studies of genotype-phenotype relationships through high resolution chromosome analysis, DNA/cDNA micro-array studies, and mouse xenografts that test for tumorigenicity. Here, we report the application of fluorescence in situ hybridization (FISH)-based techniques for the molecular cytogenetic characterization of a highly tumorigenic chPTC cell line, S48TK, and its subclones. Using chromosome 9 rearrangements as an example, we describe a new approach termed 'BAC-FISH' to rapidly delineate chromosomal breakpoints, an important step towards a better understanding of the formation of translocations and their functional consequences. CI - Copyright 2006 S. Karger AG, Basel. FAU - Weier, H-U G AU - Weier HU AD - Life Sciences Division, University of California, E.O. Lawrence Berkeley National Laboratory, Berkeley, CA 94720, USA. ulliweier@hotmail.com FAU - Tuton, T B AU - Tuton TB FAU - Ito, Y AU - Ito Y FAU - Chu, L W AU - Chu LW FAU - Lu, C-M AU - Lu CM FAU - Baumgartner, A AU - Baumgartner A FAU - Zitzelsberger, H F AU - Zitzelsberger HF FAU - Weier, J F AU - Weier JF LA - eng GR - CA88258/CA/NCI NIH HHS/United States GR - HD44313/HD/NICHD NIH HHS/United States GR - HD45736/HD/NICHD NIH HHS/United States PT - Journal Article PT - Research Support, N.I.H., Extramural PT - Research Support, Non-U.S. Gov't PT - Research Support, U.S. Gov't, Non-P.H.S. PL - Switzerland TA - Cytogenet Genome Res JT - Cytogenetic and genome research JID - 101142708 RN - 0 (DNA Probes) SB - IM MH - Cell Line, Tumor MH - Chromosome Painting/methods MH - *Chromosomes, Human, Pair 9 MH - Cytogenetic Analysis MH - DNA Probes MH - Humans MH - Karyotyping MH - Metaphase MH - Nucleic Acid Hybridization MH - Thyroid Neoplasms/*genetics/pathology EDAT- 2006/09/07 09:00 MHDA- 2006/09/19 09:00 CRDT- 2006/09/07 09:00 PHST- 2006/01/04 00:00 [received] PHST- 2006/02/03 00:00 [accepted] PHST- 2006/09/07 09:00 [pubmed] PHST- 2006/09/19 09:00 [medline] PHST- 2006/09/07 09:00 [entrez] AID - 94215 [pii] AID - 10.1159/000094215 [doi] PST - ppublish SO - Cytogenet Genome Res. 2006;114(3-4):284-91. doi: 10.1159/000094215.